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“Then there was this crescendo of noise, I looked out and there was a sea of people and cars. They were in a state of panic. There was lots and lots of noise and loads of shouting.”

Neighbours reported cars horns "honking" at around 2.30am with many trying to leave the scene before police swarmed onto the property.

(Image: Zoopla)

Meanwhile, Peter Howells, who lives in Church Lane, said: “There were hundreds and hundreds of people at this private party in the old bungalow behind the [Cock Inn] pub.

“When the police arrived, a lot of people left, I heard glass getting broken and I am just shell-shocked that this has happened – it is so odd.

“A similar event happened almost at exactly the same time last year, but this time a lot more people were here, hundreds more.

“There was even security on the door, according to one of my neighbours who lives a bit closer to the property. We live a little bit further down the road, but the noise was just echoing throughout the area.”

(Image: Daily Mirror)

Chair of Headley Parish Council and Liberal Democrat councillor David Preedy, told Get Surrey the parish council had discussed the upcoming party and warned police about possible disruption.

“The parish council’s concern was the noise and inconvenience for residents," he said.

“We were concerned with the event as it would go on until the early hours of a weekday morning and we were also worried about the mess that would be left behind.

“I have no idea what went on at the party. As I knew it could cause some noise disturbance, I went out a few times early on in the night.

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“We had mentioned to police informally prior to the party that it should be monitored, purely because we worried about the noise it would cause.

“We were concerned about quite boring, mundane things and people having a good night’s sleep and never thought a tragedy like this would happen.

"It is obviously shocking to the community.”

The Cock Inn was closed on Monday while forensic investigations were carried out on the property backing onto the pub. A cordon also remained in place in Church Lane.